On Sat Nov 1 20:49 , Hal Murray <[EMAIL PROTECTED]> sent:
>> Don't forget too, that solar noon varies quite a bit (minutes) from >> "mean solar time" over the year. If you're navigating your ship with >> noon sun sights, this is pretty important. > >What do I google for if I want that correction? This is known as the Equation of Time. If the position of the sun was plotted (or <a href="http://www.analemma.de/english/analem.html";>photographed!</a>) at the same time every day, a figure-of-eight shaped path would be drawn, which is known as the analemma. Two websites which have excellent descriptions of the effect, and hence why a sundial can often apparently be "wrong", are http://www.analemma.com/ and http://www.sundials.co.uk/equation.htm Peter _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
